The difference in length is less than 1.2 inches, a finger tip. In width that's a big deal, in length not so much. The trice is a true twin?? And I believe HEAD boards have a 1/2 inch or so setback?? Each will affect your ride a bit. I've got wrathfuldeity by 2 inches and 10", and last year rode a 126 mini teaching kids, a 159, all the way up to a 164 in the pow. Each time you ride something different, you need a lap or two to dial in.
All that said, IMHO the board should be fine. But, if you're really second guessing and have questions on your investment, just go switch it out before you beat it up. Demo 'em all, and then buy.